Electrical means for locating concealed pipes.



E. H. GROVE.

E LECTRlCAL MEANS FOR LOCATING CONCEALED PIPES l APPLlcATloN VFILED' AuG.2|. 1912.

1,241,963. Y Patented Oct. 2, 1917.

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EDWARD H. GROVE, or vvasI-iIioffron, DISTRICT or COLUMBIA, As'sIGNoR 0E ONE- EIGHTI-I TO ALBERT MARKS, ONE-EIGHTl- T RALPH A'. KERN, ONE-EIGHTH T0 .IosErII E. KEEAMEP., ann oNE- EIG-HTH To 'WILLIAM- E., SULLIVAN, oEwAsII-v INGTON, :DISTRICT O11" QOLUll/LBlZ-L ELEc'rnIcALAIvIEI-ins Eon LocA'rING coNCEALED PIPEs.

Specicaton of Letters Patent. l Pittnijedr G. 2,1.91 7.

Application med August21,1s1a serial No. 716,285.

To aZZ whom t may concern Be it known that I, EDWARD H. GROVE, citizen of the United States,` residing at Washington, in the District of Columbia,

5 have invented new and useful, Improvements in Electrical Means forfLocating Concealed Pipes, of which the following is a specication.

My present invention pertains *to electri-v location of a concealed pipe, and also showing by dotted lines the position inwhich the instrument is held, in order to apprise the operator of the location of said pipe.

Fig. 2 is a view showing the case in which the instrument is preferably carried, in longitudinal section, and also showing the instrument in elevation. Similar numerals of reference designate corresponding parts in both views of the drawings. l

Precedent to'operating my novel instrument, ll provide a suitable magnetic circuit suoli as shown in Fig. 1, in which a suitable source of electric energy 1 is arrangedv in a complete electric circuitwith means 2 for maintaining an alternating current, a water l, main 3, and house service pipes l and 5 connected to the main and between which at any suitable point the source of energy and 40 the means 2 are located. The'potential of the said circuit need not necessarily be high, but there must be suliicient amperage in the circuit in order to enable the same to cooperate with my novel instrument, as hereinafter described. v

In the present and best known embodiment of my invention of which I am cogni- Zant my instrument consists in an exploring coil 7 electrically connected with one or more (preferably two) receivers 8 which per se may be of conventional or any other suitable construction or type without affecting my invention.

accompanying and'y ing:

lBy preference the'. exploring coill 7,' equipped with binding posts 13 for the con-y nection ofthewvires leading to the receiver or receivers, and4 yis i tixedly connected through the medium .of the said posts tothe top portion 14 Otajrame oiiwood or other suitable material, which framel comprises, in Aaddition to thetoppportion 14, endportions 15. The frame' carryingthe exploring coilor. instrument ,1s a'rrangedin'the `body 16 of a case in which the frame snugly ts, so as tohide. theexploring coil from view, and Ion the said case is removably fixed a coverr 19,- the fixture being` effectedby swinging :tastenersnQO which serve for the connection ofthe ends of a'cabl'e 21 by' which the instrument andthe `case inclosf` lng the instrument may be `conveniently carried and swung as ia unit.

vFor 4the sake of convenience, the receiversl Either one or both of the pipes 4, 5, comprised in the circuit shownin Fig. 1 may be expeditiously and accurately located through the medium of my novel instruso,l

rnent, the operator holding vthe instrumentk bythe cable 21 and above theground in the position shown by dotted lines in Fig. 1--- 21e., in a position at an-angle to the pipes 11 and 5. While so holding the instrument and walking about, the operator swings the instrumentin the direction of its length.

`When swinging the device as stated, the operator may move along until, when -he is directly over the sought pipe, the noise in the telephone receivers will be as loud at one limit of the swing as at the other whereupon he will vbe apprised ofthe position of the pipe.

- An important feature of my invention resides in the fact that it operates eiiiciently while being swung above and out of contact with the ground, and also when swung above and out of contact with pavements, iiooring and the like. f

While I have. entered into a vdetailed det scription ofthe construction and relative arrangement of the parts embraced in the present and preferred embodiment of my* invention, it is obvious that in the future practice of theV invention such changes or modiiications may be made as fairly fall Within the scopeof my appended claims.

As will be observed by reference to Fig. 2, the casing body and its cover are provided with opposed notches 33 Whichv form an l ent, is:

l. In a device for the purpose described, the combination With a casing comprising a body, a removable cover, and fasteners for detachably connecting` the cover to the body;

`the rbody and cover having an opening formed by notches in their opposed edges,

and the fasteners having swinging members, of a cable connected at its ends to said Copies of this patent may be obtained for ve cents cach, by addressing the Commissioner of latents,A

members, an electrical instrument arranged in the body of the casing, a receiver, and a flexible conductor intermediate the instrument and the receiver and extending through the said opening in the casino', the said receiver and conductor being adapted to be arranged in the casing ,when the device is not in use.

2. In a device for the purpose described, a casing, an exploring coil therein, a telephone receiver outside the casing, conducting means connecting the exploring coil and said receiver, and a suspending means for the casing so connected thereto that the latter may be svvung in a plane passing through the axis of the exploring coil.

3. A device for the purpose described, comprising an exploring coil, a telephone receiver, conducting means between the exploring coil and the receiver, and suspending means for the exploring coil so'connected thereto that the latter may be swung in a plane passing through the axis of the coil.

In testimony whereof l have hereunto set my hand in presence of tvvo subscribing Witnesses.

EDWARD H. enovn.

C. W. FOWLER.

Washington, D. C. 

